Add "sync" option to gstqgcvideosinkbin

src/VideoStreaming/gstqgcvideosinkbin.c

@@ -46,6 +46,7 @@ enum {
     PROP_WIDGET,
     PROP_FORCE_ASPECT_RATIO,
     PROP_PIXEL_ASPECT_RATIO,
+    PROP_SYNC,
 };
 
 #define PROP_ENABLE_LAST_SAMPLE_NAME    "enable-last-sample"
@@ -53,11 +54,13 @@ enum {
 #define PROP_WIDGET_NAME                "widget"
 #define PROP_FORCE_ASPECT_RATIO_NAME    "force-aspect-ratio"
 #define PROP_PIXEL_ASPECT_RATIO_NAME    "pixel-aspect-ratio"
+#define PROP_SYNC_NAME                  "sync"
 
 #define DEFAULT_ENABLE_LAST_SAMPLE TRUE
 #define DEFAULT_FORCE_ASPECT_RATIO TRUE
 #define DEFAULT_PAR_N 0
 #define DEFAULT_PAR_D 1
+#define DEFAULT_SYNC TRUE
 
 static GstBinClass *parent_class;
 
@@ -256,6 +259,13 @@ _vsb_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *psp
             gst_value_set_fraction(value, num, den);
         } while(0);
         break;
+    case PROP_SYNC:
+        do {
+            gboolean enable = FALSE;
+            g_object_get(G_OBJECT(vsb->qmlglsink), PROP_SYNC_NAME, &enable, NULL);
+            g_value_set_boolean(value, enable);
+        } while(0);
+        break;
     default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
         break;
@@ -282,6 +292,9 @@ _vsb_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpe
     case PROP_PIXEL_ASPECT_RATIO:
         g_object_set(G_OBJECT(vsb->qmlglsink), PROP_PIXEL_ASPECT_RATIO_NAME, gst_value_get_fraction_numerator(value), gst_value_get_fraction_denominator(value), NULL);
         break;
+    case PROP_SYNC:
+        g_object_set(G_OBJECT(vsb->qmlglsink), PROP_SYNC_NAME, g_value_get_boolean(value), NULL);
+        break;
     default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
         break;
@@ -354,6 +367,11 @@ _vsb_class_init(GstQgcVideoSinkBinClass *klass)
             G_MAXINT, 1, 1, 1,
             (GParamFlags)(G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
 
+    g_object_class_install_property(gobject_klass, PROP_SYNC,
+        g_param_spec_boolean(PROP_SYNC_NAME, "Sync",
+            "Sync on the clock", DEFAULT_SYNC,
+            (GParamFlags)(G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
+
     gst_element_class_set_static_metadata(gstelement_klass,
         "QGC Video Sink Bin", "Sink/Video/Bin",
         "Video rendering for QGC",